Type-writing machine.



W. J. BARRON. ,TYPE WRITING MACHINE. nrmonron nun FEB. a. 1902.

Patented Apr. 13, 1909. I Inna-Inn 1.

JWZZ L %MW TT DRNEY W. J. BARRON.

TYPE WRITING MACHINE. urmm'noh FILED P316, 1902.

917,745. Patented Apr. 13, 1909.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

WALTER J. BARRON, OF NEW YORK, N. 1., ASSIGNOR TO DENSMORE TYPEWRITERCOMPANY, OF SYRA'CUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

To all whom it may concem:

Be it known that I, WALTER J. BARRON, a citizen of the United States,and resident of the borough of Brooklyn, cit of New York, in the countyof Kings an State of New York, have invented certain new and useful Imrovements in Type-\Vriting Machines, of which the following 18 aspecification.

My invention relates to escapementmechanism for typewrit' machines andto mechanism for moving t e carriage back to the right a letter s acedistance at a time.

Oiie object o the invention is to provlde a simple, strong, rapid andefficient escapement mechanism and one wherein the same escapement maybe used to feed the carnage either on the down stroke, the up stroke oron both the down and up stroke of a e lever, whereby the escapement maybe rear ily set to provide an ordinary, reverse, or double letter spacefeed of the carriage.

Another object of the invention is to produce a simple and efiicientdevice for stepping the carriage back to the ht a letter space distanceat a time, in or to insertone or more characters which may have beenomitted in the operation of the machine or to make such othercorrections or insertions as may be required. This last mentioned deviceis likewise valuable in the production of tabulating work, in which itmay be employed as a means for manually feed 0 the carriage back from agiven pointin a irection opposite to that of the normal or automaticfeed of the carriage.

To the above ends and others which will appear in the followingspecification, my in.- vention consists in the novel construction andarrangement and combinations of arts to be hereinafter described andparticu arly pointed out in the concluding claims.

In the accompanying drawings wherein like reference characters designatelike parts in the various views, Figure l is a vertical sectional viewof a sufficient number of arts of one form of typewriting machineto'lllustrate my invention, the section bei v taken from front to rearof the machine. ig. 2 is an enlarged detail rear elevation of a portionof the structure illustrating the carriage feed mechanism. Fig. 3 isaside view of the same. Fig. 4 is a view which corresponds to that shownin Fi 3 exce t that certain of the parts are omitted am those shown areillustrated in different positions from those Specification of LettersPatent.

Application filed February 6, 1902.

Patented April 13, 1909.

Serial No. 82,843.

represented in Fig. 3. Fig. 5 is a view corresponding to Fig. 4 exceptthat the parts are s mum in different positions. Fig. 6 is a detailperspective view of the dogs and cooperating switch the view being takenfrom the opposite side from that shown in F' 3, 4 and 5. F' 7 is adetail front view with parts broken away of the so-called gigbackdevice. Fig. 8 is a like view of the same; the view illustrating thepositions the parts assume in the operation of the device. Fig. 9 is arear perspective view of the ig-back device; the parts being shown in te operative P0ltl0}1ll. d1 d he fr nte 'aw' ,1 es' test ammg' of themachinel i which liiifkey lovers 2 are pivoted at 3 and each key leveris provided with the usual finger key 4 and has extending therefrom a.hook or abutment 5 which cooperates with a universal bar 6 that isprovided with rearwardly extending arms 7, the rear ends of which armsare pivoted at 8 to the framing of the machine. It will be understoodthat this universal bar extends beneath all of the hooks or abutments 5on the various key levers. Each key lever 2 is also connected to asuitable link 9, which in turn is pivoted at 10 to an actuating lever 11that is pivoted at 12 to a hanger l3 and is operatively connected at 14to a t e bar or carrier 15 that is also pivoted at 16 to the ha er 13.

e universal bar 6 has pivoted thereto at 17 a link 18, the upper end ofwhich is pivoted at 19 to an arm 20 of the feed do carrier 21. This feeddog carrier is pivot at 22 to a bracket or cast which is secured to thetop-plate of the mac e and the feeddog camer carries headed pins orscrews 23 which project through elo ated o m'ngs or slots 24 in themovable fee dogs 25 and 26 and additional screws 27 may project throughelongated openinfi 28 in the feed dogs to guide them in t eir verticalmovements.

he pins or screws 23 and 27 and the cooperating openi 24 and 28 are inthe nature of pin and s ot connections which permit the cod dogs toreceive a vertical movement on the feed dog carrier 21, and each ofthese feed do cooperate with a contractile slpring 29 which tends tomove it upwardly.

he upper end of each feed dog 25 and 26 18 bent at substantiall right ahas to the body thereof as indicat at 30 an 31 in Fig. 6 of thedrawings, for cooperation with a feed wheel 32 that is operativelyconnected to one end of a shaft 33 which is mounted in a bearing 34secured to the top plate 35 of the machine. The forward end of thisshall 33 has secured thereto a feed pinion 36 which meshes with a feedrack 37 carried by the carriage 38, which carriage may have mounted torotate therein the usual or any pre ferred platen 39.

Upon reference to Fig. 2 of the drawings it will be seen that thesprings 29 hereinoefore referred to are each connected at one end to apin 40 that is carried upon the feed dog carrier, whereas the oppositeend of each of these springs is connected to a pin 41 which is securedto its cooperating feed dog and projects through the elongated slot inthe feed dog carrier as shown in dotted lines at 42. The bent end of thefeed do 25 is limited in its downward movement by an abutment 43 formedby the upper end of the feed dog carrier, and this abutment for limitingthe downward movement of the feed dog 25 on a. lower level than thecorres onding abutment 44 of the feed dog 26, as s own in Figs. 3 4 and5 of the drawings. From this it will be seen that under certainconditions which are represented in Fig. 3, the operative face of thefeed dog 26 is on a. slightly hi her level than the corms endingoperative ace of the feed dog 25, w en the dog 26 is in engageme'nt wita. tooth of the feed wheel for p oses which will hereinafter appear.

he feed dogs 25 and 26 are provided with looking notches or depressions45 and 46 respectively and 006 rating with these lockingnotches arelocfiiifilfingexs 47, 48, which are carried by a so-c ed ock or switch49 that is pivoted to the feed dog carrier at 50 so that the pivotthereof is coincident with the pivots 22 of the feed dog carrier. Thisswitch has a laterally extending arm 51 which terminates in afingerpiece 52 by which it may be moved to any one of several positions. Thefeed dog carrier 21 has n sp arm or look 54 secured thereto at 53, t epointed end 55 of said arm being adapted to seat itself in any one ofthe three recesses or depressions 56 in the bod y of the switch in orderto maintain it in any one of the three 'tions to which it ma v be movedby its 'ece 52. This switch 49 carries a. depend arm 57 which isprovided with a stop or a utmcnt 58 which, when the parts are m theosition represented in Fig. 5 of the drawings rs at its lower end upononeof the screws 23 so that the screw forms a rigid sup rt thereforwhile the stop is interposed in t e path of a sto pin or abutment 59carried by the feed 0g 25. Adjacent to the etc 58 on the switch is arecessed portion 60 which is brou ht into the path of the pin 59 on thefeed cfiig when the switch has been moved to the position indicated inFi 3 of the drawings. The dotted lines a in Fig. 5 of the drawingsindicate the limit of downward movement of the food dog: 25 when thestop is interposed in the path of its coopcmtilw stop 59 on the feeddog. In this position (ll the parts it will be observed that the u pcruroperative face of the food dog 25, wine 1 is indicated by the uppermostdotted line a will be maintained on a higher level than the upper oroperative [are of the feed dog 26 [or pu oses which will hereinafterappear.

hen the lock or switch is set 111 the osl tlon shown in Figs. 1 and 3 ofthe drawings, the locking finger 47 thereof will he forced mto the notch45 of the feed dog 25 so as to maintain it against vertical movement. Atthis time the feed dog 26 is free to more in a vertical direction on thefeed dog carrier. This arrangement of the parts is such that the naturalor ordinar feed of the curringe is produced; that is to so the carriagewill be fed on the up stroke of t 10 key. Thus a depression of one ofthe keys 4 will cause the universal bar 6 to be depressed, therebvdrawing down the link 18 and transmittingh vibratory movement to thefeed dog carrier on its pivotal center 22, so that the feed dogs arerocked toward the front of the machine. These movements of the parts areeffective to release the feed dog 26 from the feed wheel '32 and the dog25, which at this time is a fixed dog, comes into contact with the sametooth of the wheel which was engaged by the movable feed dog 26 toprevent a rotation thereof. The feed dog 26 having been released in themanner 5 cified will be moved upwardly by its spring 29 to a positionwhere it is adapted to cooperate with the next succeeding tooth of thefeed wheel and when the operator releases the key 4 the dog carrier willmove toward the rear of the machine, thus disc agin the fixed dog 25from the tooth of t e w eel with which it was in engagement and at thesame time the loose dog will be moved into the path of the nextsucceeding tooth. The carriage will then be fed in the direction of itsfeed one letter space distance under the tension of the carriage springwhich is effective to depress the dog 26 against the tension of itsspring, and the parts will again be arrested in the position indicatedin Fig. 3. From this it will be seen that the feed movement of thecarnage has taken place on the upstroke or release of the fuiger key. Asbefore explained, when the arts are in this position the upper oroperative face of the dog 26 will be maintained on a higher level thanthe corresponding face of the other feed dog. This is in order toprevent any wear on the operative face of the dog 26 from interferingwith the proper operation of the escupement which ordinarily mightresult in a side of the other feed dog coming into contact with the sideof the tooth ol" the food wheel during' the feed movement. It will beunderstood that m move the switch from the the resent structure it willrequire considerab e wear, and more than the dog is liable to receive,to bring the operative face thereof to a'lowcr level than thecorresponding face of the other dog thus avoiding any interference inthe operation of the escape-merit through the wear on the feed dog 26.

In order to set the escapement device for reverse feed it is merelynecessary to osition represented in Figs. 1 and 3.01 tie drawings tothat shown in Fig. 5, when the locking finger 47 will be withdrawn fromenga ement, and the finger 48 will be engaged in the cooperating notch46 in the feed dog 26. In these ositions of the parts the dog :26becomes the ocking or fixed dog, whereas the dog 25 is the feed ormovable do In operation a depression of a key 4 will eause the do rcarrier to move the dogs in the direction 0? the arrow in Fig. 5, ortoward the front of the machine, when the feed wheel will be releasedfrom the do" 26 and the next succeeding tooth will, by the somemovement, be brought into engagement with the loose dog 25 and thecarriage will be fed under the pressure of its spri thus forcing theloose dog against the tension of its spring, so that the carriage is fedon the depression of the finger key. When the o orator releases thepressure from the he t e movable dog 25 will be moved away from thetooth of the feed wheel which maintains it under pressure and the fixeddog 26 will, at the same time, be brought into e flagement therewith, sothat no movement h i the feed wheel and the carriage is permitted onthis upward movement or release of the he As before explained, w en theswitch is in the posit-ion represented in Fig. 5 the operative face ofthe feed dog 25 which is indicated by the uppermost dotted line a willbe maintained on ahigher level than the feed dog 26, by reason of thefact that the abutment- 58 has been interposed, by the movement of theswitch, into the path of the cooperating abutment or pin 59 on this feeddog, to limitthe downward movement thereof, so that am wear which takesplace upon this dog 25 will be ineffective to prevent a proper feed ofthe parts by the side of the feed do coming into contact with the sideof a tooth of the feed wheel which would result in arresting themovement of the dog carrier and preventing a proper operation of thecscapement.

From the foregoing description, it will be understood that whether theescapement be set for the natural or ordinary or for reverse feed theoperative face of the loose dog is always maintained on a higher levelor in advance of the corresponding face of the fixed dog so that anywear which takes place upon the dogs cannot act injuriously in theoperation of the escapement.

Then the operator desires to provide a ceeding tooth of the wheel.

double letter space feed for making headings and the-like, it is merelynecessary to move the switch to the intermediate position illus- (ratedin Fig. 4. when both of the locking lingers 47 and 48 are nmintninedout. of locking engagement with their cooperating locking recesses -15and 46 respectively, and both iced dogs are ndapted to move vertically.in Fig. 4 both of these dogs are illustrated in the elevated position,though it should be understood that the pressure of the carriage springupon the feed wheel will normally maintain the feed dog 26 depressedagainst the tension of its spring. A depression of a linger key 4 willmove the dogs toward the front of the machine, thereby releasing thefeed dog 26 from the engaged tooth of the feed wheel and simultaneouslyinterposing the feed dog 25 in the path of the next sue- When the feeddog 25 has been thus interposed in the path of this next succeedingtooth of the feed Wheel the tension of the carriage spring will overcomethe spring 29 of the dog 25, forcing the dog downwardly to the limit ofits movement. The same movement of the parts having released the feeddog 26 from the wheel, the tension of the spring of the dog will forceit upwardly and to a position to cooperate with the next succeedingtooth of the feed wheel when the dog carrier is again moved toward therear of the .machine. A release of the fin er key by the o rator will beeffective to ring about this rearward movement of the dogs therebyengaging the dog 26 with the cooperating tooth of the feed wheel andsimultaneously releas' the feed dog 25. From this it will be seen t at afeed of the carriage is produced both on the down stroke and up strokeof each key, and that a double letter s ace feed is provided at eachoperation of a. ey lever.

In the various movements of the switch to the positions hereinbeforedescribed, the spring arm 54 will be forced against the ten- $1011 ofits s ring by the inclined sides of its pointed en coming into contactwith the walls of the cooperating recesses 56. When, however, the switchis properly positioned in any one of the three positions described, thepointed end of the lock or spring arm 54 will be properly positioned inthe center of its cooperatir recess, so as to lock and maintain theswitc in the set position.

Suitable means may he provided to limit the movement of the feed dogcarrier in opposite directions in Order to regulate the timing of thecscapement; thus I have shown in the present instance a lug 61 which issecured to the top plate of the machine at 62 and has a screw-threadedopening with which an adjustable screw 63 cooperates. The rear end ofthis screw may be )rovided with a suitable hnll'er 64 that is I opted toreceive the impact of the feed dog carrier and thereby limit themovement thereol' toward the front of the machine. A lock nut maylikewise be employed to secure the screw in the adjusted position. Itwill be understood that suitable means may also be provided to limit themovement of the feed dog carrier in an opposite direction, and therebynicely regulate the feed action of the escapcmcnt.

W'hile I have shown and described with considerable detail one form ofescapement mechanism embodying my invention, it should be understoodthat from certain aspects of the invention it is immaterial whatcharacter of escapement mechanism is employed. For instance, while Ihave shown one feed element (the rack 37) carried by the carriage,whereas another feed element (the feed wheel 32) is carried by theframing of the machine and intermediate mechanism (the shaft and feedpinion) is interposed between the two feed elements to operativelyconnect them, it is obvious that the connection may be a direct one, andthat the feeding instrumentalities may be varied to apply the principleof my invent-ion to type-writing maclnnes of different character-strumthat shown and described. It should also be understood that any one ormore of the features of my new escapement mechanism may be employedwithout the others and wit out do arting from the s irit of the invetionas de ed in the appen ed claims.

I will next describe the so-called gig-back device whereby the carriagemay be stepped back toward the ht, a letter space distance at a time. hefront rail of the carriage has a su porting bracket 71 secured theretoat 72 an this bracket carries a hearing 73 for a short rock shaft 74which has a crank arm or finger piece 75 secured to the forward endthereof and extending toward the right hand side of the machine as illustrated in Figs..7 and 8. The rear end of the rock shaft has a dependingcrank arm 76 secured thereto and to the lower end of which is pivoted at77 a gig-back pawl 78 that is adapted to cooperate with a rack bar 79that extends throughout the extent of travel of the carriage and theteeth 80 of which extend toward the right. This rack bar is preferablycarried by the shift rail 81 so as to move therewith during thetransverse shifting movement of the platen but to remain fixed withrelation to the travel of the carriage though obviously the rack bar maybe otherwise arranged. The pawl 78 is provided with a tail iece 82 whichextends beyond the pivot o the awl and this tail piece as well as thepaw itself is flattened on the upper side thereof for cooperation withthe underside of the front carriage rail which constitutes an abutmenttherefor. The parts are normally maintained in the positions shown inFig. 7 by a spring 83 which is connected at one end 84 to the rail 70and at its opposite end 85 bears on the under side of the finger piece75. The pressure thus exerted upon the parts maintains the pawl out ofengagement with its rack by forcing the tail of the pawl against thebottom of the rail 70. When however, the finger piece 75 is depressedthis pressure will be released and the spring 86 which is secured at 87to the crank arm 76 becomes effective to move the pawl around its pivotand into engagement with the teeth 80 of the rack as shown in Fig. 8. Afurther depression of the finger piece to the dotted line position inFig. 8 is eflective to vibrate the arm 76 and thus cause the carriage tobe moved one letter space distance to the right. A series of quickdepressions of the finger piece 75 is effective to step the carriageback any desired number of letter space distances.

The gig-back arrangement is a valuable aid in the production oftabulating or billing work. Thus we will suppose that a bill to bewritten is as follows:

Coal $748. 44 Wood- 58.00

In this event it is merely necessary to Write the word coa and todepress the carriage release key, thus permitting the carriage to moveto the left until a predetermined 1ploint, say 65 on the carriage scale,is reac ed and which will corres 0nd to the units column and then tomenta ly read off the amount and to depress the finger piece 75 for eachcharacter involved in the mental reading. This operation of the fingerpiece for the first amount mentioned above will manually feed the car ein a direction reverse to that of its ordinary or automatic feedmovement, seven letter space distances and the operator may then roceedto write the amount $748.44. The next amount may be written in the samemanner, the carriage in each instance being arrested at the pointdetermined on for the units column, which I have assumed to be 65 andeach time the carriage will be fed back by the gig-back device therequisite number of letter space distances; the number of such distancesdependixn on the number of characters emplo ed in the sum to be written.

but I claim as new and desire to secure by Letters Patent is:

1. In a typewriting machine, the combin ation of type carriers, meansfor actuating said type carriers, a carriage, a feed element on thecarriage, a pair of cooperating independently movable feed dogs on theframing of the machine, and hand operated regulating means for lockingone or free' both of stud feed dogs so that one or both ogs may he madestepping dogs and the carriage can be fed one or more letter spacedistances at each operation of the ty e carrier actuating 1 to be movedby their sprin and means means, in accordance wit the positioning of lwhich cooperate with the fee dogs to feed said hand operated regulatingmeans.

2. In a typewriting machine, the combin :1- tion of type carriers, meansfor actuating said type carriers, a carriage, a feed element on thecarria e, a plurality of coo crating movable feed dogs which are movab ein two directions, a hand operated lock cooperating with said feed dogsso that the carriage can be fed ordinary or reverse or can be fed morethan one letter space distance at each operation of the t e carrieractuating means in accordance wit 1 the positioning 0 said hand operatedlock, and a movable stop which is moved into the path of and limits themovement of one dog when another is locked, whereby the operative faceof one dog will be maintained above the corresponding face of the otherdog.

3. In a t ewriting machine, the combination of a og carrier, a pair offeed dogs which are movable in two directions, a feed rack whichcooperates with said dogs and a locking switch carried by said dogcarrier for locking either of said dogs ainst movement in one directionor maintaining both of them free to move in both directions, whereby anordinary reverse or a plurality of letter space distance feed may beprovided.

4. In a t ewriting machine, the combination of a 0g carrier, a pair offeed dogs which are movable in two directions, a feed rack whichcooperates with said dogs, a locking switch carried by said dog carrierfor locking either of said dogs against movement in one direction ormaintaining both of them free to move in both directions, whereby anordinary reverse or a duality of letter space distance feed may eprovided and means for locking the switch against movement with relationto the dog carrier.

5. In a typewriting machine, the combination of a pair of longitudinallyand laterally movable spring pressed feed dogs, means for maintainingeither of said dogs locked against the tension of its spring or formaintaining both dogs free to be moved by their springs and means whichcooperate with the feed dogs to feed the carriage, whereby an ordinaryreverse or double letter space feed may be provided at will.

6. In a typewriting machine, the combination of a pair of longitudinallyand laterally movable spring ressed feed dogs, a locking element carriedy each of said dogs, a locking switch which has locking elements thatare adapted to 006 erate with the locking elements on the fee dogs,means for maintaining the locking switch in position where it willcooperate with either dog or be out of cooperation with both dogs, formaintaining either of said dogs locked against the tension of its springor for maintaining both dogs free the carriage, whereby an ordinaryreverse or double letter space feed may be provided at will.

7. In a typewriting machine, the combination of a vibratorv dog carrier,a pair of S)I'i pressed notched feed dogs carried t iere y and movablethereon, a switch which is pivoted to said do carrier and adapted toengage in the notch of each feed dog to lock it against movement on thedog carrier or to be maintained out of locking engagement with both doand a feed element cooperating with sai feed do where by an ordinaryreverse or dou le letter space feed may be provided at will.

8. In a typewriting machine, the combination of a vibratory dog carrier,a pair of sprin pressed notc led feed dogs carried t ere y and movablethereon, a switch which is pivoted to said do carrier and adapted toengage in the notch of each feed dog to lock it against movement on thedog carrier or to be maintained out of locking engagement with bothdogs, a feed element cooperating with said feed dogs whereby an ordinaryreverse or double letter space feed may be provided at will and a stowhich is carried by said switch and whic is moved into the ath andlimits the movement of one dog w en the other is locked.

9. In a typewriting machine, the combination of type carriers, avibratory do carrier, means for moving said dog carrier at eachoperation of the type carrier, a pair of spring pressed notched feeddogs carried by said dog carrier and movable thereon, a switch which ispivoted to said dog carrier and adapted to engage in the notch of eachfeed dog to lock it against movement on the dog carrier or to bemaintained out of locking engagement with both dogs, means for securingthe switch in any one of the various positions to which it may be movedand a eed element 006 crating with said feed do whereby an or ,inaryreverse" or doub e letter s )ace feed may be provided at will.

10. n a typewriting machine, the combination of type carriers, keylevers therefor, a power driven carria e, a feed wheel operativelyconnected to t e carriage, a vertically mounted vibratory feed dogcarrier, independently movable spring pressed feed dogs cooperating withthe feed wheel and mounted to move vertically on said carrier, thecooperating feeding pro'ection of each dog extending at substantia yright angles to the body thereof, means for vibrating the dog carrier ateach operation of a t e carrier and means for locking either 0 said dogsagainst vertical movement or for permitting both dogs to movevertically, whereby the carriage may be fed either on the depressiontheir feeding operation.

or on the upward movement or on both the depression and upward movementof a key lever.

11. In a typevrriting machine, the combination of type carriers, keylevers therefor, a power driven earri e, a feed wheel operativelyconnected to t e carriage, a vertically mounted vibratory feed dogcarrier, independentl; movable spring pressed feed dogs coperatmg withthe feed wheel and mounted to move vertically on said carrier, thecooperating feeding projection of each dog extendin at substantiallyright angles to the body t liereof, means for vibrating the dog carrierat each operation of a ty we carrier, means carried b the dog carrier orlooking either of said 0 against vertical movement when the ot er isunlocked or for permitting both dogs to move vertically, whereby thecarriage may be fed either on the deression or on the upward movement oron 0th the depression and upward movement of a lie lever, and means forretaining the dog loc means in its set position.

12. In a typewriting machine, the combination of acarriage and anescapeinent therefor, said escapement comprising movable feed dogs,means for locking either of said d against movement, and means forcontro the movement of the unlocked dog so that the o erative facethereof will be in advance of t e operative face of the locked d toprevent the wear on the dogs from in te ering with their feedingoperation. A

13. In a typewritinfi machine, the combination of a carriage an anescapement therefor, said escapement comprising movable feed dogs, handoperated means for locking either of said do against feed movementandmeans contro ed in part by said locking means for controlling themovement of the unlocked dog so that the operative face thereof will atall times be in advance of the o erative face of the locked dog, toprevent t e wear on the do from interfering with 14. In a typewrit'machine, the combination of a carriage an an escapement therefor, saidescapement comprising movable feed dogs, means for locking eit er ofsaid dogs against movement to provide an "or dinary or "reverse feed atwill, means which are hand 0 rated and movable in art for limiting t emovement of the unocked dog in one direction so that an operative facethereof will at all times be in advance of the operative f ace of thelocked dog, to prevent the wear on the dogs from interfermg with theirfeeding operation.

15. In a. typewriting machine, the coinbinat-ion' of a carriage and anescapernent therefor said escapement comprising movablefeed dogs, meansfor locking eitherof said dogs against movement, a re atively fixedabutment which limits the movement of one of said dogs in one directionand a relativelv movable abutment which is adapted ti) cooperate withthe same dog to limit its movement in the same direction but at adifferent )Ollli, whereby the operative face of the un ocked dog can bemaintained in advance of the locked dog at all times.

16. In a typewriting machine, the combination of a carriage and anescapement therefor, said escapement comprising movable feed dogs, ahand operated switch for locking either of said dogs against movementand an abutment carried by said switch and adapted to cooperate with anunlocked dog to limit its feed movement and to maintain the operativeface thereof in advance of the locked dog.

17. In a typewriting machine, the combination of a carriage and anescapement therefor, said escapement comprising movable feed dogs, meansfor locking either of said dogs against movement, a relatively fixedabutment which limits the movement of said-do s in one direction, and arelativelv movable albutment which is controlled in its movement by thelocking means and which is adapted to cooperate with one of the dogs tolimit its movement in the same direction that it is limited b a therelatively fixed abutment' but at a dit erent oint, whereby theoperative face of the u ocked dog can be maintained in advance of thelocked dog at all times.

18. In a typewriting machine, the combination of an escapement therefor,said I escapement comprising a dog carrier and .1 I v I iced cogs hellare movable on said carrier,

a stop on the carrier for limitin the movement of one of the dogs in oneirection on the carrier, a switch carried by the carrier and adapted tolock either of said dogs a ainst movement on the carrier, a fixed autment on the carrier which cooperates vith one of the (logs to limitits movement in one direction and a stop on the switch which cooperateswith the same dog to limit the movement thereof in the same directionwhereb the operative face of the unlocked 3.0g w always be in advance ofthe locked 19. In a t pevrriting machine, the combination wit anescapement which can work either ordinal-y or reverse feed and means formaintaining the feeding element of the escapement in advance of thefixed or retaining element whether the escapement be working ordinary orreveise" feed. I

20. In a typewriting machine, the combination of type carriers means foractuatmg said type carriers, :1. feed element, a pair of cooperatingindependently movable eed dogs coo erating with said feed element, and asingle rand-operated regulating means for coking either one or freeingboth of said positioning of said single hand-operated regufe'ed dogs sothat either or both feed dogs may be made stepping dogs and the carriagemay be fed one or more letter space distances at each operation of atype carrier actuating means in accordance with the ating means.

21. In a typewriting machine, the combination of. type carriers, meansfor'actuating the type carriers, a carriage, a feed element, a pair ofcooperating feed dogs which are movable in two directions, and a singlehand-operated lock cooperating with said feeddogs for locking either ofsaid dogs in one posltion or freeing both dogs so that the carriage canbe fed ordinary or inverse or can be fed more than one letter spacedistance at each operation of the type carrier actuating meansinaccordance with thekpositioning of said single hand-operated 22. In atypewriting machine, the combination of type carriers, means foractuating said type carriers, a carriage, a feed element, a pa r ofjndependently movable feed do which cooperate with said feed element anfiwhich are movable in two directions, a sin le hand-ppcrated lockcooperatin with sai feed dogs for locking either of sai dogs in oneposition or free' both dogs so that the carriage can be fed ordinary orreverse or can be fed more than one letter space distance at eachoperation of the type carrier actuating means in accordance with thepositioning of saidingle hand-operated lock, and a movable stop which ismoved 1 into the path of and limits the movement of one dog when anotheris locked, whereby the o aeratlvc face of one dog will be maintained aove the cooperating face of the other dog.

23. In a typewriting machine, the combination with a carriage of anescapement mechanism com rising means for obtaining an ordinary feed:means for obtaini a reverse feed and means for obtaining a ouble feed ofthe carriage.

24. In a ty )ewriting machine, the combination of a 1) atom, a powerdriven carria e which carries said platen, escapement mec anism for thecarriage, a pivoted gig-back pawl independent of the escapement mech'anism, a finger key for actuating said pawl, a bracket detachablyconnected to the carriage at the front thereof and carrying saidgig-back pawl and its actuating finger key so that the latter is readilyaccessible to the operator, and a rack which is fixed against travelwith the carriage and extends in the direction of the travel of thecarriage, the gig-back awl being normally out of engagement with saidrack but cooperative therewith at any point in the travel of thecarriage to-efiect a step-by-step backward feed movement of the carriae.

Signed at the borough of fianhattan city of New York, in the count ofNew ork, and State of New York, tlns fourth day of February A. D. 1902.

WALTER J. BARRON.

Witnesses:

K. V. Donovan, E. M. VVELLs.

